Samsung LA22N21B Service Manual page 45

5-7 No Picture (Component1, 2 : 480i, 480p, 720p, 1080i [Y, Pb, Pr])
Power Indicator is off.
Lamp on, no video.
Yes
Dose the signal appear at
13
output Pin (#19_Y, #15_Pb,
#21_Pr) of IC103 ?
Yes
Does the signal appear at
14
output #15_Pr, 19_Y,
21_Pb of IC102 ?
Yes
Does the digital data
appear at output of
2
RA101 ~RA104,
RA106, RA107 ?
Yes
Does the digital data
3
appear at output of
RA555~RA559, RA561?
Yes
Does the digital data appear at
4
output of RA402~RA407?
Yes
Does the digital data appear at
5
output of FT501~FT503,
FT505 ?
Yes
Check a LVDS cable?
Replacea lcd panel?
(BN07-00114A, BN07-00125A)
LA22N21B
No
Connect the RCA cable.
Operating a DTV STB and DVD player.
(BN39-00279A)
Check a IC103 and IC902.
No
Change a main PCB ass'y
(BN94-00496X).
Check a IC102 .
No
Change a main PCB ass'y
(BN94-00496X).
Check a IC101 and IC107.
No
Change a main PCB ass'y
(BN94-00496X).
Check a IC565, IC105 and IC506.
No
Change a main PCB ass'y
(BN94-00496X).
Check a IC403.
No
Change a main PCB ass'y
(BN94-00496X).
Check a IC503.
No
Change a main PCB ass'y
(BN94-00496X).
No
Please, Call to Samsung Co. LTD.
5 Troubleshooting
5-15